Facultad Regional Mendoza

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Author: search.filters.author.Arena, AlejandroStart date: 2023

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Now showing 1 - 5 of 5
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    Aprovechamiento de los residuos de poda del arbolado urbano para la generación de energía y la mitigación del cambio climático
    (Universidad Tecnológica Nacional. Faculatd Regional Mendoza, 2024-01-01) Piastrellini, Roxana; Curadelli, Silvia; Delgado, Mariela; Arena, Alejandro
    Evaluar el desempeño ambiental de la producción y uso de briquetas para calefacción de hogares como alternativa de gestión de los residuos de poda y desrame del arbolado urbano de Mendoza (Argentina)
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    Análisis ambiental de la generación de energía solar y de biomasa bajo la perspectiva de nexo agua-energía-alimentos
    (Universidad Tecnológica Nacional. Faculatd Regional Mendoza, 2023-01-01) Piastrellini, Roxana; Arena, Alejandro; Curadelli, Silvia
    El presente trabajo expone los principales resultados de una evaluación del nexo Agua-EnergíaAlimentos (AEA) para la generación de energía de origen renovable en Argentina, específicamente electricidad obtenida en un parque solar fotovoltaico de la región de Cuyo y biodiesel obtenido a partir de un cultivo energético en la región Pampeana. Para alcanzar el objetivo propuesto, se realizó un análisis de ciclo de vida y se definió como unidad funcional “1 MJ de energía generada en un sistema abastecido por fuentes renovables”. Los impactos de la generación de energía sobre los subsistemas que componen el nexo AEA se evaluaron mediante un enfoque metodológico que considera tres indicadores de eficiencia: Retorno de la inversión en energía no renovable; Retorno energético de la inversión en agua; y Retorno energético de la inversión en suelo productivo. Los resultados muestran el comportamiento de los dos sistemas evaluados en cuanto a la eficiencia en el uso de energía fósil, la disponibilidad de agua y la capacidad del suelo para producir y sostener biomasa útil. El estudio pone de manifiesto la utilidad de los indicadores de eficiencia de nexo para proyectar y seleccionar sitios óptimos para el emplazamiento de sistemas energéticos renovables en el país.
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    Evaluation of the environmental sustainability of agricultural production using the methodologies of emergy analysis and life cycle assessment. case study, tomato grown in Mendoza (Argentina)
    (Universidad Tecnológica Nacional. Faculatd Regional Mendoza, 2024-04) Piastrellini, Roxana; Arena, Alejandro; Civit, Bárbara; Curadelli, Silvia
    This article evaluates the environmental performance of tomato production in Mendoza (Argentina) using two methodologies that share the same approach and part of the inventory: i) Life Cycle Analysis, a method that considers all flows (incoming and outgoing) involved in the life cycle of a product, and ii) Emergetic Analysis, which represents the environmental support provided directly and indirectly by the biosphere to economic processes in the form of resources and ecosystem services. The combined application of these two tools helps to identify critical points in the production system and to generate proposals for improvement and innovation. In this case, the critical points identified are irrigation and fertilizers. Specifically for the environmental category Climate change, crop irrigation represents 51 % of the total impact, while seedling production represents 22 %. The emergy analysis, without accounting for direct and indirect human labor, shows a low contribution of local natural resources to the final product (0.12 %), as well as an environmental burden of 7.23 %. The results show that the local environmental dynamics are altered because tomato production is mostly driven by external inputs, mainly fertilizers (especially nitrogenous fertilizers) and energy.
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    Cultivating communities in Mendoza, Argentina : exploring social aspects of urban agriculture
    (2023-01-01) Arena, Alejandro; Civit, Bárbara
    Global food production and security are current challenges. This is reflected, among other things, in the fact that more than 690 million people suffer from hunger or food shortages. The availability of nutritious food is critical for disease control and immune function. In this context, urban agriculture is promoted as a way to ensure access to food, which has developed due to rising prices, food shortages and urban growth. However, there is a lack of in-depth knowledge on the impacts as well as barriers to implementation. Therefore, this study investigates vegetable consumption patterns in the metropolitan city of Mendoza in Argentina, as well as interest in vegetable production, opinions on urban agriculture and barriers. Quantitative research methods were used, and a citizen survey was conducted. The data was analysed using SPSS software and correlations were determined using chi-square. The results show strong interest from citizen in urban agriculture, but also barriers such as lack of time and resources. Successful implementation requires initiative, political will, and acceptance. The results are consistent with other studies and could be further explored in longitudinal studies to assess effectiveness. This is helpful given the importance of urban agriculture and vegetable consumption for sustainable food production and supply.
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    Measuring the symbiotic performance of single entities within networks using an LCA approach
    (2023-10-01) Arena, Alejandro; Rodriguez, Paula; Arce Bastias, Fernando
    This paper introduces the Symbiotic Performance Indicator, a novel indicator aiming to quantify the environmental benefits generated by by-product exchanges in an industrial symbiosis network. Despite the significant advancements in assessing industrial symbiosis, the lack of indicators for individual entities involved in byproduct exchanges hinders a comprehensive understanding of its environmental benefits. This indicator accounts for resource use and greenhouse gas emissions using a life cycle perspective. The resource use is measured using the Cumulative Exergy Extraction from the Natural Environment method, while greenhouse gas emissions are evaluated using the IPCC 2013 Global Warming Potential (100a) method. The use of this indicator is illustrated in a real case study where plastic waste is exchanged among three entities in Mendoza (Argentina). The overall results show that resource use and greenhouse gas emissions can be reduced by 19% and 15%, respectively. Full and partial allocation methods are proposed within the formulation of the Symbiotic Performance Indicator. The indicator results show that the exchange of materials may seem less attractive when using full allocation methods, as one entity gets 100% of the benefits from the by-product exchange compared to the other. Partial allocations make the by-product exchange convenient for both entities which may encourage collaboration. In conclusion, the proposed indicator helps account more precisely for individual environmental benefits behind by-product exchanges, and thus enables better decision-making to set up an industrial symbiosis network.